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====== Glossary ====== | ====== Glossary ====== | ||
===== C ===== | ===== C ===== | ||
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+ | ==== C String Omnidex Datatype ==== | ||
+ | * A legacy Omnidex datatype name that is now referred to "String". A datatype in Omnidex that refers to a string terminated with a null just like strings in the C language. C Strings are used as a return data type from many Omnidex SQL Functions. C Strings are recommended over the Varchar datatype because of internal performance. | ||
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- | ==== Calling errors ==== | ||
- | * Syntax errors that cause programs to fail. | ||
==== Cardinality ==== | ==== Cardinality ==== | ||
* A term indicating the number of unique values in a column or the number of rows in a table. | * A term indicating the number of unique values in a column or the number of rows in a table. | ||
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==== Column cardinality ==== | ==== Column cardinality ==== | ||
* The number of unique values in a column. See also: cardinality, table cardinality | * The number of unique values in a column. See also: cardinality, table cardinality | ||
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==== Composite index ==== | ==== Composite index ==== | ||
* A type of Omnidex index that lets you index data from either a part or a combination of parts of columns, or entire columns (one or more items from a field). You can create composite indexes in DBINSTAL during Omnidex installation. See also: composite keys | * A type of Omnidex index that lets you index data from either a part or a combination of parts of columns, or entire columns (one or more items from a field). You can create composite indexes in DBINSTAL during Omnidex installation. See also: composite keys | ||
- | composite keys | ||
+ | ==== Composite keys ==== | ||
* A logical MDK or ASK field comprised of several fields or parts of fields. See also: composite index | * A logical MDK or ASK field comprised of several fields or parts of fields. See also: composite index | ||
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==== Custom Indexes ==== | ==== Custom Indexes ==== | ||
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